Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f585e9e5a41fbb…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 05:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1cff091b5715a3c6d924569b8a608a0c SHA-1: 14fa1d9533d0158ae508def74837017c958f6b16 SHA-256: 34f585e9e5a41fbbcd84e084c8a32a4970b956d37d21838dc06f4d970ea2a625
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-hack-version-download-2021-android-game-hack PDF link annotation
    • https://audev.com/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://audev.com/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://audev.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://audev.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://audev.com/images/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://audev.com/images/simplysarc_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://audev.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E5 24524 bytes
SHA-256: 25b4a17634989c4cc23cb63a30edf2a3164f8be1b2aef5cf3b3895c74915261e
font_01_sfnt_off00008005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8005 18832 bytes
SHA-256: cd0ec0ee3d6d2e78cc0295f59590dfb899d6956e54506a4c66f347aa13d8e697

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